Boring mechanism



Aug. 2, 1927.

J. T. HlscocK BORING MECHANISM Filed Jah 12. 1925 4 Sheets-Sheet 2 i 1,637,611 Ah8- 2 1927' .1. T. HlscocK BORING MEGHANI SM Filed Jan.12. 1925 4 sheets-Sheet 3 V the arrows. Figure 13 vvisrabrol/{en view,r

. ot the arrows.` in elevation ot Patented ugi'Zr, 19,27. i

Unir*EDl STATES] PATENT OFFICE. u

JOHN 'n HIsoocK; 0F CHICAGO, ILLINoIs.y

Application filed January `boringtools provided tot reboring the cylinders of engines.y f f p x yfIt-Tis desirable that such devices be pro 7 vided withl roughing and finishing cutters andithat these cutters be adapted ttoradjustf lne-nt relative 'to' eaclnother toy vary the amount of cutting performed by each.

'Onecf myobjects is to provide aidevice above referred to, and which shallbe of comparatively simpleconstruction,positive in of suchconstruction that adiustment when 1n `Referringto the accompanying drawings o a Figure 1 is a view in sider elevation l boring tool embodying my invention. `Fig- :ure 2 is an enlarged, broken, section talren at the line, 2'-2 on Fig.` 1 and viewed 1n the directionfot the arrows, this View showing thecutting tools adjusted i l :extreme position. Figure 3 '1s a section taken'at the' liney on 2 and viewed in the direction of the arrows.` Figurea is a broken section taken at the linel-?L on Fig and viewed in the direction 'of the arrows#Figures 4,5, `6, "VT, Sand 9, are sec tions taken at lines` correspondingly nu'in bered on Fig. 2 and viewed inthe ydirection FigurelO 1s a broken view Figurelly 'is a section 'ustin it tlie cutters. J b 1o yand takenk at the line 11-11 on Fig.

viewed in the ldirection of the arrows.

on rand viewed rin 'the directiony of like Fig. 2`-and of parts therein shown, the

,cutting tools being adjustedoutwardly lto the eXtreme limit. Figure 14 1s view like Fig. 2 ot al modification of the structure therein shown. Figure y1li-is asectiontak'en attliejline15415"onFig- 14 and viewed' in the direction of the arrows; Figure 161s a view ylike Fig. 10 `of they cutter-adjusting yllieansioit the structureshown in'Figs. 14 and 15 g andFigure 17, a section taken at the line 17e-,17 on Fig. l'and viewed in the'fdirectionof'the'arrows.` t, y i

' eerring to the lstructure f shown in Figs.` 1 'toy 13,' inclusive, the devicefwhich is" adaptedftobe introduced 'into,'-andheld` in, the

whereby*thel `cutters 'may be adjusted ask nwardly n to the `a detail of the devices for ad-' Fig, ure'12 is asectfion taken at the line112-'-12 BORING MECHANISM.

12,1925; Serial No. 1,867.

ycylindrical member 2O with its cylindrical" side wall 20L cut away at intervals as shown, ,the-member 2O presenting ring portions 21 and 22 at its ends,`and between its ends a i c y1,637,61f

ring'portiony 23k supporting a sleeve-like' member 24 which is shown as integral'with ythefring 2J and is disposed concentrically krwith theside'wall'20a of the member 20, the upper end of. the member 20 terminatin'gin a "tapered yshank-portion 25 at whichthe kdevice is adaptedto be clamped in a chuck.

l. The. device also comprises a ring 26 located below the yring 21 and in spaced relation thereto, the ring 26 being rigidlysecured in rsuchspaced conditionby bolts 27 which are kof enlarged `diameter between their ends to atlord shoulders 28 and 29. The bolts v27 extend` at their upper, reduced ends 3() through openings'y in the ring21 and abut at their uppershoulders 28 against the underside of vthis ring. The bolts 27 at their lower, reduced, ends'l extend through openings in the ring 26 and abut at their lower shoulders 29 against they underside of this ring, these 'bolts thus serving to ysecurely clamp fr these rings together in spaced relation. f y

`The device also comprises radially adjustableblo'cks and 3?) located in the spacey between therings 21 and 26 and vprovided in sets grouped about the Ylongitudinal axis ofl yscribed,the blocks 32 and S32- lk being *guided* 33 and therin'gs' 21 and 26 aremechanism,

for radial movement at groovesSSjand 39 and 40 and 41, respectively, in their top and n botton'n surfaces and into4 which grooves --`tongues`42, 43, v44 and' 45, on r` the" clampm'cg mechanisms referred to, respectively"exten` f Means 'are priwideciV for` independently' -f' ing a continuation thereof.

radially adjusting `the bloclrs 32 and to vary the extent to which the cutting devices thereon radially piotrucc. The means `for adjustin the blocks 33 for the finishing cutters, comprises ahead #lo located in the body member 2O and Jiformed or a lower member l? containing an opening 48 therethrough com miinicating with an upwardly-opening,sociret i9 in its top, and a member 50 located in `tlies cket @i9 and secured to the member i? by set-screw l and provided with an upwardly extending' tubular portion 52 enterY nally threaded, represented at at which it engages the internal threads lot a il. in

4lrnurled nut! 55 carried by), and rotatable on,

the sleeve 24' as'by-the.connectionshown and comprising acollar secured in the lower end or the sleeve hv a set-'screw 5f and extending into an annular grooveS in the periphery o the upper portion ot the nut at which portieri the nut entends up-r wardly into this sleeve; the member 55 containing an opening 59 therethrough of the same diameter as theopening and tormofthe member 4:7 is provided with'depend Y ing downwardly taperingsegmental fingers l in vthe illustrated construction.

60 of a number corresponding with the number of blocks 33 employed, three being shown rllhe segmental fingers GO are equidistantly spaced apart and oppose rthe inner surfaces ot the blocks 33 the inner surfaces of these lingers represented at 51 .being preferably oatwardly otiisetrelative to the opening i8 in the member 4'?, Yasv shown in 2,74, o nfl T11 O fnl fio' i' '1' 1 and i le segmenmi iiigeis (rio pio vided,` on their outer inclined faces with dovetail ribs 62 which thus incline downwardly toward the axis of the device, these ribs slidingly interifitting the walls oi dove i tailed grooves 63 provided in the correspondingly tapered inner surfaces of the blocks 38, By thisk arrangement the'shiitting of the headt@ up or down, by rotatingthe nut k55,

causes the blocks 33 to be moved'radially in or out'degending on the direction in V'which this nut is rotated. Y y f The means 'for effecting radial adjustment Vof the blocks 39. comprises a head G4 mounted on the lower end ot rod t which er-V tends upwardly inthe space between the blocks 32 and 38 attlie center of the device and upwardly rthrough the opening' 'A8-59 in the head 16. The upper, threadech Y extremity G6 of the rod engages with `The head @el is ce like portion 71 at which it surrounds the rod rnut 67 located at the topot1 thesleeve and rotatably'coniined thereon bj a collar'68 which issecured inV the sleeve 24 by a set-V screw 69,` this Acollar extendingr intov an' yanvnular4 groove "Z0 rin the periphery ci" the lower, reducedgportion of the nut '6T ywhich the latter ezrtendsinto the sleeveQsi. formed cita. central sleeve- The lower endY and from which radiate., segmental ribs 72 having upwardly and inwardly inclined outer faces these ribs being equidistantly spaced apart and staggered relative to the lingers 60. The inclined outer faces of the ribs T2 are provided with dovetailed rib portions il which slidingly intertit with the walls or dovetailed grooves 75 provided in the correspondingly tapering opposed inner faces oi' the blocks 32. By this arrangement the shitting ofthe head 64rup or down by rotating the nut 67 causes 'the' blocks to be moved radially in or out depending on the direction in which this nut is rotated.

Infthisy connection it may be stated that the grouping oil' the lingers 60' about the Vaxis ot the 'device7 with the offsetting oi' their inner surfaces, as heieinbefore described, it ttor the purpose ot pern'iittingthe sleeve portion .71ct the head G5 to pass Vfreely upwardlyy therein as Jfor example to the position shown in Fig. 13 by rotating etler ot' the nuts 55 and 6T, or both of them in a direction to move the cutters controlled thereby radially iutwardly`v in which movet the ngcrs't) and the ribs 72, ,by reason Y ered relationship slide relative into inter-meshing relation as to each yoth "shown in this figure7 this feature of the dcunderside of the ring 76, but the upper sur.-

faces of Vwhich extend above the upper surfaces of this ring, as showm the tongues hereinbefore referred to and which extend into the grooves 38 in the blocks 32, being" provided 0n ,these segments. Segments 7S connect with the lower end of screw bolts 79 having lower shoulders 80 bearing against the upper faces of the segments 78, the bolts 'T9Y e:\:tendingupwardlyr into the ring 2l and bearing atV shoulders Si thereon Yagainst the underside ot' this ring. The arra'ngeinentY 'gust describeclrigidly securesl the-rings 'T6 in spaced relation kto the ring 21. i i

Therring i Y is provided equidistantly spacedA segments y82 the upper surfaces of Vwhich extend flush with the upper surface of the ring .'rbutftlie'under-surfaces of which est i d below the under-surface of this ring, as shown, the-bolts 27 extending through the segments 82V as shown in 5. and the segments 82 carryingthe tongues 4A hereinbefore described and extending intovk 'the groovesI 40 inthe blocks. The segments. 82

which alternate Jwith the segments 78andr interit' therewith,I as r shown, are 'thicker than the segnients 78 orthe purpose hereinset forth." n, v Snperposing the ring 77 isa knul-led ring, 83 containing arc shaped slots 84 throngh Vwhich i thejbo'lts'27 and-79 extend,y 'these slots permit,-

ting' the' ring 'S3 :tovbe'rotate'd through a" partialrevolution for f al purpose hereinafter described. `The vring 1 83 I Whichiis y freely sli d y ahlefnpf and ydown i's"providedL'With. an'np-` Wardly #extending ysleeifo-portion vwhich exi tends ,into/the space' between tlienieinherv 47 andthe ring 21, the spacing ot the ring'78 froirijthexrin'g '21' being such fasy permit 'ot' the ebofie 'refe'rredto up andv down 'niovenient of"ther1ng`j83. The upper vsurface ofv the ring 83 contains 'seats 85 for balls Stivhich cooperate With l cani-surfaces f, 87 rprovided] on the underside" ofthe ring 21*andjdi`sposed ine y'circular series about the 'axis' of thejde Vice,k these' caniIr surfaces inclining` in tlie saine'f-direction and yoperating,in the engagefl prises rings87and88 fiatwise opposed be# f loiifftlife blocks 32 and S` provided `with radiating eqnidistantly'spaced Segments, 89"whichfextend aty their upper snrfacesyjliish with `theopper surface ofy The i ring 87 is the'ring 87', lbut entend atfther under sides helen1 (the` under-surface of this ring,"` as shown, tliesesegments carrying the upwardly extendingv tongues 45 herfe'inheforede-y serihedfnd extending into'` the grooves 41 in tliefrvlocks 33.1 The 1ing`87 4is heldin spac'edi aftion'fto t-hex'edfringtQG by'nieane of shouldered screivholts 90, as explained oi a .z the 'connectie'n"between the rings 78 andi/)1.y

iin-le of thei The ringISSjisf'proVided withA equidistantly spaced'segments 91 `which alternate with the segnnentsk 89' and interflt 'therewith,k as

shown'. `l`he Segmente 91extei1dzat their faces fiush with the under-surface y facesfalhove'the 'upper'snrfaces ofitlns ring,

asy Shown; the segments 91 being th an the segments 89 'forthe purpose hereinafter [describedfthe' segments 9 1 .carrying thefup; o

"Ward entending "tongues 43 `h-nfei'nhetore referred ffto and" which eilt-end into the gro'oyey 39 inthe 'blt'ielsV 32.'

S is' aikiiu'rled ring92l cont ning zirciehaped slots 193 Lasl provided in fthe" `ling 'ra's'zgabove described; 'through Whichnfsllots'thebolts 27 and:eoextendftheslots 93 permitting partial g 88, but extend 'at ytheir upper sin:

with a depending k'sleeve "portion`94 lwhich slidingly extends into theI space Yin theriirgl 26,*the spacing oftlie-ring'S' from the ring 26 Mloein'g such as toperrnit-"offthe `alcove -re- 'ferred t0r upl and"down fmovvern'entf of the kring-92;'y The under-surfceofthe'ring92' f with f 'camisnr't'aces 97 providedl on the upper surfaceoi 'thering 2k6, as explained offthe cam-surfaces 21L ont'heming 21, andope'rating when the r1ng'92 '1s rotated in one direc-y tiornto force the ring 92 vupwardly against 'thesegmentsf91- v"It will be '.understo'od kromftlie foregoing thatrwhen the= ringl 83j is` forced down against the segmentsy 82,"by rotatingthe ri'ngr83in rigidly clamped'vr between `the-1segine'ntsl` 82l and thetonges 45011l` the segments '89; Land that when the ring'92`-isforced* upwardly against the segments i911byrotting`tlie, ring 92 in onerdirection' 'as`- stated; the hlocksf will be rigidly clamped'betiveen the* seg-y ments y-91 andft-he tongues42 on't'he segments y78. fThus the'mechanism'providedI an'dole' scribed permite kof 'the 'separate-f'clarnping of thef blocks 32 yand ,33wherebyeitlierset 'of blocks may befjreleasedff for radialadjnstQ` ment yWithout dis'turbingtlie clamping means fr-thefotherfset'fof blocks. j

Referring "to thtrdefv'iee shoiivn'infFigs. 14, 515,"16 an'd17, thistdevice is oftle salme general'constitictonasptlie devicey of the preceding lligu'res, except for fthepositioning* ofV p the adjsting 'device for thelhloeks carrying the roughing cutters and the direction ,offin clinationI of n the grootfeeqtiipped"inner' inclined, surfaces; of 5 these Blcke, the'y same numbers' 4representirigf correspondiiigy kparts in theitwo constrictions. In; thisidevice the Wedgingnemljerli for the blocks is reverse'lypos'itioned 'lon'y tliejr'o'd `65` and is i *telescopedtet all7 times, in' thelpzfrtic'nlar arf rangement with vthe'fWedgiiig krmeiher' 47 for the blocks' Bytlie lspaced arrangement 32 instead of inclining downwardly landfoutfigures, 'incline downwardly and inwardl as shownfan'das iin' ,th`e""'cas'efof^the incl ned surfaCeS" of thebloeke Sei l I' this-arrange; ment the,separateadjustment of?, n; eef-ganci '33 inthetrempe'direccin, is @pf- 1 ect'ed` by rotationfo'f the-l nuts: y l55 .the fdire'ctio'f' instead" off in Y opposite dimmenesjfinfnie @esem the devia@ Amathe v`Wardlyas in the structure of thejirecedihg n other device, in that kthat portion of the tool which extends below the blocks 32 and 33 may be made somewhat thinner'permitting 'the Vcutters to penetrate to va greater depth into asocket. to be bored. Y i

It-will be manifest from the foregoing that notonly are the sets` of cutting devices independently adjustable `for regulating the depth of cut and mechanism is provided vfor independentlywclamping these ,setsV of de* vices, but .the device is very. compact and Y positive in operation. v L

While I have illustrated and :deseribedva particular construction .embodying my inventioml do Ynot wish tofbe understoodras intending to limit it thereto,'as the saine may be variously Amodified and altered without departing from the vspirit of my invention. YVhat I have described as new, and desire to secure byLetters Patent, is: Y Y

i l. A'boring tool comprising a supporting member, 'Ycuttingfedgeequippedf devices adjustablefthereon forvrregulating the depth of out,and devicesfroif separately Vadjusting said first named devices, saidlast named devicesbeing movable toward and away from each other and one thereof being formed of fingers spaced apartand the other thereof formedof a member having ribs thereon alternately disposed relative to said vlingers and adaptedV yto intermesh therewith, said parts being so constructed and arranged that $0@ said blocks, `one of saiddevices comprising saidV last referred to member may eXtendinto the space surrounded by' said v,fingers in the intermeshed Condition vof said ribs andvtingers. Y 2. member, cutting-'edge-,equipped blocks adjustable'thereon for regulating vthe depth .of-

cut, and devices "forl separately adjusting ngers spaced apart and having an Voperating portion projecting therefrom, and the operating portion, said operating portions.

otherof said devices comprising amember having ribs thereon and provided with an being arranged vone within the other,V and means engaging ,said portions for moving said Y devices,Y

"I 3.7Aboring tool comprising asupporting member', outting-'edge-equipped blocks adjustablek thereon for regulating. the depth of cut, means .clamping said blocks independently of each otherin adjusted position and `involving i j sets'` of intermeshed segment'- equipped rings-at `oppositejendsfof said blocks and betweeniwhioh said blocks ai'e clampedsfand rotary means for applying clamping ,pressure again-st said'fr'ingsg V4f. Aboring tool comprising sa supporting "member, cuttingeedge-equippedf'bloclrs adj ustable thereon foriregulating the depth ofv Y aout, means clampin V.said blocks indejgiend-A Y ently of each otherin adjusted positionand involving sets Vof members' at. opposite ends A yboring toolcoinprising a supporting f of said blocks relatively movable lengthwise of the tool, one of Vsaid'members in each set being so constructed and arranged as to clamp one of saidjblocks therebetween, and

Y ferred to up and down movement of the j structed and arranged as to clamp another of said blocks therebetween.

5. A boring tool comprising a supporting member, cuttingedgeequipped blocks adjustable thereon for lregula-tingthe depth of out, means clampingsaid blocks independf ently of each other in adjusted position vand involving sets of intermeshing segmentequipped rings at opposite ends of blocks relatively- Vmovable lengthwiseV of the tool, d

one ofsaid ring devices'of each set being soV f other members of said sets being movable lengthwise ofthe tool, kand means for forcing saidlast referred to members towards said blocks, vone of said movable members lill having a portion between which Y` and one of said stationary members one of said blocks is clamped, and thejotheriof said movable members having a portion between which and the other of saidy stationary members theother of said blocks is clamped.

V7. A boring tool comprising a supporting member, cutting-etige-equipped i blocks adI .justable thereon for regulating the depth of out, means-.clamping said blocks independently of each otherk in adjusted position, and

involving sets of members at opposite ends ofsaid blocks, one of said members of each set being held against movement and the othermembers of said sets being vmovable lengthwise of' the tool and rotary means for forcing said last referred to Vmembers towards said block, one of said movable members having a portion between which and one ofsaid stationary members onefof said blocks is clamped, and the other of said movy' able members :having` a portion between which andthe other of said stationaryV mem-y bers the otherofsaid blocks is clamped.

8. A boring tool comprising a supporting member, cutting-edge-equipped blocks adjustable thereon vforregulating the depth of. cut, meansclamping said blocks independently of eachotherinadjusted position and involving-sets of segment-equipped internieshin'gring devices at opposite endsof said first named blocks, one of saidy segmenti lla equipped devices of each set thereof being held a ainst movementy and the other mem-y bers o? said sets being movable lengthwise of the tool7 and means for forcing Said last 5 referred to segment-equipped device toward said blocks, one of ysaid segment-equipped devices having a portion betweeny which and one of said stationary segment-equipped devices one of said blocks 1s clamped, and the other of said segment-equipped devices having' a portion between which and the other ofsaid stationary members the other of said blocks is clamped.

JOHN r. HrscocK. 

